Cloudflare D1

ELI5 — The Vibe Check

D1 is Cloudflare's serverless SQL database built on SQLite. Yes, SQLite — but replicated globally and accessible from Workers. It's like having a tiny, fast database at every edge location. Perfect for read-heavy workloads where you want the simplicity of SQLite with the distribution of a CDN. Write to one place, read from everywhere.

Real Talk

Cloudflare D1 is a serverless SQL database built on SQLite, designed to work with Cloudflare Workers. It supports standard SQL, automatic read replication to edge locations, time-travel queries for point-in-time recovery, and the familiar SQLite API. It's optimized for read-heavy workloads at the edge.

Show Me The Code

// In a Cloudflare Worker
export default {
  async fetch(request, env) {
    const { results } = await env.DB.prepare(
      'SELECT * FROM users WHERE id = ?'
    ).bind(1).all();
    return Response.json(results);
  },
};

When You'll Hear This

"D1 gives us SQL at the edge — queries run in the same data center as the user." / "We use D1 for our blog's CMS data — reads are instant worldwide."